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swrast: new assertions in _swrast_pixel_address()

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Brian Paul 2012-01-16 10:54:53 -07:00
parent e34a54ff45
commit 33257803d9
1 changed files with 8 additions and 0 deletions
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8
src/mesa/swrast/s_context.h
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@ -430,6 +430,14 @@ _swrast_pixel_address(struct gl_renderbuffer *rb, GLint x, GLint y)
{
const GLint bpp = _mesa_get_format_bytes(rb->Format);
const GLint rowStride = rb->RowStride * bpp;
assert(x >= 0);
assert(y >= 0);
/* NOTE: using <= only because of s_tritemp.h which gets a pixel
* address but doesn't necessarily access it.
*/
assert(x <= (GLint) rb->Width);
assert(y <= (GLint) rb->Height);
assert(rb->Data);
return (GLubyte *) rb->Data + y * rowStride + x * bpp;
}